---
slug: "mac-clang-error-unknownargument-mno-fused-madd-ARCHFLAGS"
title: "mac で clang: error: unknown argument: '-mno-fused-madd' → ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future"
description: "\n\n\n$ pip install reportlab\n\nしたら"
url: "https://www.ytyng.com/blog/mac-clang-error-unknownargument-mno-fused-madd-ARCHFLAGS"
publish_date: "2014-04-27T09:53:28Z"
created: "2014-04-27T09:53:28Z"
updated: "2026-02-26T22:00:34.864Z"
categories: ["mac"]
keywords: ""
featured_image_url: "https://media.ytyng.com/resize/20230812/92ee1dca6a62445ab76d487dbe9fe7c3.png.webp?width=768"
has_video: false
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video_urls: []
music_urls: []
lang: "ja"
---

# mac で clang: error: unknown argument: '-mno-fused-madd' → ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future

<div class="document">


<pre class="literal-block">$ pip install reportlab
</pre>
<p>したら</p>
<pre class="literal-block">clang: error: unknown argument: '-mno-fused-madd' [-Wunused-command-line-argument-hard-error-in-future]

clang: note: this will be a hard error (cannot be downgraded to a warning) in the future

error: command 'cc' failed with exit status 1
</pre>
<p>となった。</p>
<p>依存パッケージ (pillow?) のインストール時に出てるっぽい</p>
<p>Fix 'clang: unknown argument' error after updating to Xcode 5.1</p>
<p><a class="reference external" href="http://kaspermunck.github.io/2014/03/fixing-clang-error/">http://kaspermunck.github.io/2014/03/fixing-clang-error/</a></p>
<p>ここを参考に</p>
<pre class="literal-block">ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future pip install reportlab
</pre>
</div>